Hello JustLittleOldMe,
The MS220-48 and MS220-24 switches would still be fine to operate until next year, but be aware that they will no longer be covered by a hardware warranty. If they fail, support will be unable to replace them.
There are also a few more things to be aware of for end of support devices, which can be found here:
https://meraki.cisco.com/meraki-support/policies/#product-end-of-life-eol-policy
Outside of that, it is up to you on how you would like to move forward. If you are ok with the above information, then you should be fine using the devices until at least the license runs out for them. Or if that sounds risky, you may want to consider replacing them with functionally equivalent devices. The EoL documents for each product line have recommendations on what the equivalent, for sale model is.
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